Method and apparatus for producing a combustible mixture



-s. G. BRIGEL. METHGD AND APPARATUS FOR PRODUCING A COMBUSTIBLE MIXTURE. APPLICATION FLLED SEPT. 24. 1919.

1,346,935. v Patented 'July 20, 1920.

2 SHEETS-SHEET l.

llllllln Illllllh IIIII S. G. BRIGEL. METHOD AND APPARATUS FOR PRODUCING A COMBUSTIBLE IVHXTURE.

APPLICATION FILED SEPT. 24. I9I9.

1,346,935, I Patented July 20, 1920.

2 SHEETS-SHEET 2.

narran srArEs "PATENT oFFlc-E.

SAMUEL- e. PEIGEL, or PITTSBURGH, PENNsYLvANIA, vAssIeNoR To JOHN M.

EAvEETr, TRUSTEE, or PITTSBURGH, PENNSYLVANIA. f

METHOD AND APPARATUS FOR PRODUCING A COMBUSTIBLE Ii/.IIIX'JUZRJLk Teaches.

T0 all whom t may concern:

Be it known that l, SAMUEL G. BRIGEL, residing at Pittsburgh, in the county of Allegheny and State. of Pennsylvania, a citiZen ofthe United States, have invented or discovered certain new and useful mprovements in Methods and Apparatus for Producing a Combustible Mixture, of which improvements the following is a specification.

The invention described herein relates to certain improvements in gas burners. lt has heretofore beenthe'practice to so construct burners that the jet or stream of gas issurrounded by an annular streamof air, the quantity of air admitted being proportional to the quantity of gas, but as the gas is lighter than the air, it would move upwardly and commingle with "the air of the upper portions of the annular stream, of air, and the lower portions of such annular stream would How along under the stream of gas without mixing therewith, and hence when the quantity of air is so proportioned to the quantity of gas that only the amount `of air required for vthe combustion of the gas is admitted, partv of the airwill not be utilized for combustion, but passes into the furnace Vwithout producing any beneficial effect, and by reason of this loss of air a full complete combustion of the gas is not obtained.

VThe object of the invention described herein is to provide for vdirecting a thin stream orv sheet of gas below a sheet or flat stream of air entering the mixing chamber, at a point or points above the gas inlet so that a mixing of the gas and air may result primarily through the difference ofthe specific gravities of the two, as the gas being ofless specific gravity than the air will rise up and the air will move down, thus insuring a thorough commingling of the gas and air. The invention is hereinafter more fully described and claimed.

In the accompanying drawing forming a part of this specification, Figure l is a top plan view of a burner embodying my improvements; Fig.2 is a sectional elevation of the same, and similar to Figs. 1 and 2 and illustrate ka modification of the burner.

Vln the practice` of the invention it is preferred to introduce the gas into a receiver or gas chamber yl which is vpreferably pro- Figs. 3 and 4L are viewsy Specification of Letters atent. v Patentd July 20, 19.20. Application filed September 24, 1919. Serial No. 326,050. l l

vided with inlets 2 onboth upper and lower faces to facilitate connection with supply` pipes. Gas flows from this chamber througha narrow slit 3 into a mixing cham- A" ber 4C which is preferably made independent of the gas chamber, and bolted thereto,

rlhe gas chamber is preferably provided `von" one side with a nose-like extension 5, which' projects into the yopen rearend of the mixing chamber, said Anose resting onthe under wall of the mixing chamber. rlhe inlet' slitis formed in the end of the nosej so that gas issuing .therefrom will llow in a wide thin sheet closely adjacent yto the lower inner surface of the chamber.A towardjthe outlet of the chamber. The gas/discharge 3 is so constructed that the gas delivered intov the mixing chamber will flow through the, chamber as a thin stream having awidth.v equal or approximatelyequal to the yinternal width of said chamber, and to Vthis end the discharge vfrom the 'gas chamber maybe formed by one or more narrowy slits or'by a plurality of closely adjacent small perforations. l

rlhe air for supporting combustion enters the mixing chamber through-aport r'ports so constructed and arranged that the air will flow' into and along the chamber inthe form of a stream having a width substantially equalto that of the gas. This stream of air as it enters `thechamberV is preferably directed downward toward the streamA of gas and forwardly toward the outlet from the mixing chamber, so that it will impinge on the stream of gas at an acute angle. Y V. Y

As the gas enters the mixing chamber it will tend to move upwardly andv encounter and mix (to a greater orless degree) with the downwardly and forwardly flowing stream of air.` The mixing of theair and gas will not be complete .where they irst` (2V) water column, more or less, and the mixing chamber is made of such a size that the flow of gas will be affected more by the stack draft in the fire box than the pressure lin the gas chamber. As the rate of flow of gas will be due almost entirely to stack draft, its movement will have little or nov effect on the rate of flow of the air, and

hence the rate of fiow of thelatter will also be due to stack draft. As the ow of both the gas and air is due to the same cause,

their rate of flow will be substantially equalr How of the gas and to that end'a series of `suitably .spaced ports 6 are formed in the top wall of themixing chamber, the flow of air through said' ports being controlled by avalve 7 which can be shifted by any ysuitable means, as for example, by a lever 8' as jshown. lAs shown, one of the air inlet ports is so located that the inflowing gas will encounter the air atvabout the time the gas enters the mixing chamber, and when onlyone air inlet port is employed, as shown in Figs. 3 and 4, it is arranged to permit of the early contact of the air and as. v l

While not necessary, provision may be made for crowding together the streams of gas and air by causing a convergence of the upper and lower walls ofthe mixing chamber, as indicated at 9 and 10, Fig. 2.

I claim herein as my invention: l. The method of producing a combustible Vmixture of air and gas lighter than air which consists in directing a stream of gas lighter .than air and having a width greater than its thickness through a suitable chamber, and directing a quantity of air sufficient to effect substantially complete combustion of the gas into the chamber in the form of a stream having a width approximately equal to that of gas at a point above the stream of gas, and in such relation thereto that va completely combustible mixture of the gas and air would be effected by reason of the relative specific gravities of the gas and air.

2. The method herein described of producing a combustible mixture ofk air and gas lighter than air, which consists in directing a stream of gas having a width greater than its thickness through a suitable chamber, and so directing a stream of air of approximately the same width on to the upper surface only of the stream of gas, and causing such streams to flow at substantially the same rate through saidchamber. Y

3. The method herein described of producing a -combustible mixture of air andV gas lighter than air, which consists in directing a stream of gas along the bottom of a suitable chamber, and directing a quantity of air sufficient to effect substantially complete combustion in the form of a stream into the Y space between the upper surface of lthe stream of gas and the top of the chamber, thereby affording opportunity for opposite vertical movements of the fluids of the two streams." Y y 4. The method herein described of producing a combustible mixture of air and a gas lighter than air which consists in directing a stream of such gas having a width greater than its thickness along the bottom of a suitable chamber and directing a quantity of air suiiicient to effect substantially complete combustion of the gas in a plurality of streams of substantially the same'width into the space between the upper surface of thel f stream of gas and the top of the chamber.V

5. In a burner for gas lighter than air the combination of a mixing chamber, means for introducing gas lighter than air Vinto the mixing chamber in a directionrv parallel with the bottom of the chamber and an air inlet port arranged in a plane above the point of entrance of the gas thereby insuring a thorough commingling of the fluids differing in specic gravity as they pass through the mixing chamber.

6. In a burner for gas lighter than air the combination of a mixing chamber, means for introducing gas lighter than air in the form of a stream having a Width greater, than its thickness in a direction parallel with the bottom of the chamber and an'air inlet port arranged in a-plane above thev point of entrance of the gas thereby insuring a thorough commingling of the fluids by reason of their different specific gravities as they pass through the mixing chamber.

7. In a burner for gas lighter than air the combination of a mixing chamber, means Y for introducing gas lighter than Vair in the form' of a streamhaving a width greater than its depth or thickness at a point a substantial distance below the top ofthe mix- 1x15 l ing chamber, and means for introducing a quantity of air sufficient to effect substantially complete combustion of the gas into the space intermediate the top of the mixing chamber and the stream of gasso that by 12o v reason of their difference in specific gravity the two fluids will intermingle as they pass through the mixing chamber. Y

8. In a burner for gas lighter than air the combination `of a mixing chamber, means for introducing gas lighter than air in the form of a stream having a width greater than its thickness or depth in a direction parallel with and adjacent to the bottom of the chamber and a plurality of ports for the admission of air into the chamber, all of said ports being so arranged as to direct the air for the substantially complete combus tion of the gas into the chamber at points above the stream of gas so that all fluids Will intermingle by reason of the diierence in specific gravity as they flow through the mixing chamber.

9. 1n a gas burner the combination of a mixing chamber a gas chamber having a nose projecting into one end of the mixing chamber and having an outlet adapted to direct a stream of gas lighter than air and having a Width greater than its depth or thickness into the mixing chamber at a point adjacent to the bottom' of said chamber, said mixing chamber being provided with ports arranged to direct air for combustion into the chamber above the plane of flow of the gas through the mixing chamber whereby the gas and. air for combustion are free to mingle by reason of their dieren'ce in spe-- cie gravity, and means for regulating the flow of air into the mixing chamber.

In testimony whereof l have hereunto set my hand. v

SAMUEL Gr. BRGELQ 

